XC6901DB21MR-G

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The XC6901DB21MR-G is a negative voltage CMOS regulator from the XC6901 Series by Torex Semiconductor. It provides a fixed output of -2.1V with a maximum output current of 200mA. The device operates within an input voltage range of -2.4V to -12.4V and supports an operating ambient temperature range of -40°C to 85°C (Type D). Key electrical characteristics include a typical supply current of 100μA, a standby current of 0.01μA, and a dropout voltage of 210mV at 20mA. It features built-in overcurrent protection, thermal shutdown, and a CE pin for active-high control with auto-discharge functionality.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrates ON/OFF control via the CE pin, enabling stand-by mode with low power consumption and internal auto-discharge of the output capacitor.
• Includes comprehensive protection circuits such as foldback current limiting and thermal shutdown to ensure safe operation under fault conditions.
• Capable of stable regulation with ceramic output capacitors due to built-in phase compensation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Negative power supplies
• Wireless LAN modules
• Digital still cameras
• Mobile devices and terminals

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'MR-G' corresponds to the SOT-25 package and reel packaging configuration. Confirm that Type 'D' indicates the 85°C maximum operating temperature rating. Ensure the ordering code matches the required -2.1V output voltage designation. Cross-reference the datasheet version ETR03043-009 for accurate electrical specifications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed negative voltage rail is required for portable electronics. The SOT-25 package suits space-constrained designs. Verify that the input voltage headroom accommodates the dropout requirements at the expected load current. Consider the 100μA quiescent current impact on battery life in stand-by applications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the XC6901 Series of 200mA negative voltage regulators. The series offers various output voltages and packages including SOT-25, SOT-89-5, and USP-6C. The 'B' in the output code denotes 0.05V increments for voltages between -0.95V and -4.95V, while '1' indicates 0.10V increments for other ranges; here it specifies -2.1V.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

XC6901DB21MR-E

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the CE pin function affect the output voltage?

When the CE pin is at a high level (+1.2V to +3.6V), the regulator is active. When low or open, it enters stand-by mode, and the output capacitor discharges internally to the GND level.

What is the purpose of the CL discharge resistor?

The internal CL discharge resistor rapidly discharges the charge stored on the external output capacitor when the IC is turned off, preventing malfunction caused by residual voltage.